. American engineer and railroad journal . November. 1911. AMERICAN ENGINEER AND RAILROAD JOURNAL 443 IMPROVEMENTS IN SPEED CLUTCHES The ;ulvciit of high speed steels, deiiiandiiig licttcr ami morepowerful clutclics on countershafts, and many ntlK-r require-ments imposed by modern practice, has resulted in a very highdevelopment of these devices. They have been adopted for useas parts of machines by sonic of the leading manufacturers withperfect success. lor the past several years the Carlyle JohnsonMachine Co., of Manchester. Conn., makers of the Johnson fric-tion clutch, have been embodying
. American engineer and railroad journal . November. 1911. AMERICAN ENGINEER AND RAILROAD JOURNAL 443 IMPROVEMENTS IN SPEED CLUTCHES The ;ulvciit of high speed steels, deiiiandiiig licttcr ami morepowerful clutclics on countershafts, and many ntlK-r require-ments imposed by modern practice, has resulted in a very highdevelopment of these devices. They have been adopted for useas parts of machines by sonic of the leading manufacturers withperfect success. lor the past several years the Carlyle JohnsonMachine Co., of Manchester. Conn., makers of the Johnson fric-tion clutch, have been embodying many improvements whichsimplify the working mechanism of these clutches, and add totheir efficiency, with the result that a product is attained in thenew design leaving practically nothing to be desired from theviewpoint of either efficiency or simplicity. As will be seen in the accompanying illustrations, tliis clutch ^^3^L i ■■ ■■ BE ^^B m .SINCLK CLUTCH— SECTION SHOWING CLUTCH i;XC.\ljED AND FULLEV MOUNTED ONHUB OF FRICTION CUP. has but few parts, and is very compact. A body fastened to theshaft carries a split ring in which are inserted a pair of curve-shaped wedge, which is made part of a shipper sleeve,forces the levers apart, expands the ring and brings the outersurface into frictional contact with the inner surface of thefriction cup, the hub of the latter being made to suit require-ments. The leverage is so compounded that very little pressure is re-quired to operate the clutch. One screw which moves two taperblocks, set into the levers, adjusts the contact of the ring andcup to any tension. This is easily reached with a screw driverthrough a hole in the friction cup. The perfectly smooth ship- per sleeve entirely covers the working parts so no dirt can getnear them. The double clutch requires but little more space thansingle and has two friction cups with hubs on which can bemounted pulleys, cones, gears, etc., of any
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
